Armature

Abstract

In the armature, a first connecting part and a second connecting part that are disposed so as to be adjacent to a connecting part of a different phase have a higher insulatable voltage value than a first leg part and a second leg part that are disposed so as to be adjacent to a leg part of the same phase.

The invention claimed is: 
     
       1. An armature comprising:
 an armature core provided with a plurality of slots extending in an axial direction; and 
 a coil part including: first segment conductors of a plurality of phases each including a pair of first leg parts extending toward one axial side in the axial direction, and a first connecting part that connects together end parts on an other axial side of the pair of first leg parts; second segment conductors of a plurality of phases each including a pair of second leg parts extending toward the other axial side in the axial direction, and a second connecting part that connects together end parts on the one axial side of the pair of second leg parts; and a joint part where an end part on the one axial side of one of the first leg parts and an end part on the other axial side of one of the second leg parts are joined together in one of the slots or axially outside one of the slots, 
 wherein 
 the first leg parts of each of the plurality of first segment conductors each are disposed so as to be adjacent to the first leg part of a same phase, 
 the second leg parts of each of the plurality of second segment conductors each are disposed so as to be adjacent to the second leg part of a same phase, 
 the first connecting part of each of the plurality of first segment conductors is disposed so as to be adjacent to the first connecting part of a different phase, 
 the second connecting part of each of the plurality of second segment conductors is disposed so as to be adjacent to the second connecting part of a different phase, 
 the first connecting part and the second connecting part have a higher insulatable voltage value than the first leg parts and the second leg parts, 
 each of the pair of first leg parts and the pair of second leg parts is not provided with an insulating layer, and 
 at least a portion of the first connecting part where the first connecting parts of different phases are disposed so as to be adjacent to each other and at least a portion of the second connecting part where the second connecting parts of different phases are disposed so as to be adjacent to each other are provided with an insulating layer. 
 
     
     
       2. The armature according to  claim 1 , wherein
 in one of the slots, a plurality of the first leg parts are arranged radially and a plurality of the second leg parts are arranged radially, 
 a plurality of the first connecting parts are arranged radially on the other axial side of the slot, 
 a plurality of the second connecting parts are arranged radially on the one axial side of the slot, 
 at least one of the plurality of the first connecting parts arranged radially is provided with a first inclined part that is inclined toward one radial side, and 
 at least one of the plurality of the second connecting parts arranged radially is provided with a second inclined part that is inclined toward one radial side. 
 
     
     
       3. The armature according to  claim 2 , wherein
 each of a plurality of the first inclined parts and a plurality of the second inclined parts is arranged radially, 
 one of the first inclined parts provided on one radial side has a greater angle of inclination with respect to the axial direction than one of the first inclined parts provided on an other radial side, and 
 one of the second inclined parts provided on one radial side has a greater angle of inclination with respect to the axial direction than one of the second inclined parts provided on an other radial side. 
 
     
     
       4. The armature according to  claim 2 , wherein in one of the slots, the plurality of first leg parts of a same phase are arranged radially and the plurality of second leg parts of a same phase are arranged radially. 
     
     
       5. The armature according to  claim 1 , wherein
 the first connecting part has a first bent part that bends at a center of the first connecting part; and a pair of first diagonal parts that extend toward the pair of first leg parts sides from the first bent part, 
 the second connecting part has a second bent part that bends at a center of the second connecting part; and a pair of second diagonal parts that extend toward the pair of second leg parts sides from the second bent part, 
 a first-connecting-part-side insulating layer is provided on each of the first bent part and the pair of first diagonal parts, and 
 a second-connecting-part-side insulating layer is provided on each of the second bent part and the pair of second diagonal parts. 
 
     
     
       6. The armature according to  claim 5 , wherein
 the first-connecting-part-side insulating layer includes: a first base insulating layer and a first added insulating layer provided on a surface of the first base insulating layer, 
 the second-connecting-part-side insulating layer includes: a second base insulating layer and a second added insulating layer provided on a surface of the second base insulating layer, 
 the first added insulating layer of the first-connecting-part-side insulating layer provided on the first bent part and the first added insulating layer of the first-connecting-part-side insulating layer provided on each of the pair of first diagonal parts are provided integrally, and 
 the second added insulating layer of the second-connecting-part-side insulating layer provided on the second bent part and the second added insulating layer of the second-connecting-part-side insulating layer provided on each of the pair of second diagonal parts are provided integrally. 
 
     
     
       7. The armature according to  claim 1 , wherein
 a first-connecting-part-side insulating layer is provided so as to surround the first connecting part in a circumferential manner at a cross-section orthogonal to a direction in which the first connecting part extends, and 
 a second-connecting-part-side insulating layer is provided so as to surround the second connecting part in a circumferential manner at a cross-section orthogonal to a direction in which the second connecting part extends. 
 
     
     
       8. The armature according to  claim 1 , wherein
 the first connecting part has a first bent part that bends at a center of the first connecting part; and a pair of first diagonal parts that extend toward the pair of first leg parts sides from the first bent part, 
 the second connecting part has a second bent part that bends at a center of the second connecting part; and a pair of second diagonal parts that extend toward the pair of second leg parts sides from the second bent part, 
 the pair of first diagonal parts is disposed so as to extend to intersect with each other and so as to be shifted relative to each other in radial location, 
 the pair of second diagonal parts is disposed so as to extend to intersect with each other and so as to be shifted relative to each other in radial location, 
 at least one of the pair of first diagonal parts has a portion that is partially provided on a plane facing radially and that is adjacent to the first connecting part of a different phase, and 
 at least one of the pair of second diagonal parts has a portion that is partially provided on a plane facing radially and that is adjacent to the second connecting part of a different phase. 
 
     
     
       9. The armature according to  claim 8 , wherein
 the pair of first leg parts is disposed so as to be shifted relative to each other in radial location by an amount corresponding to a radial width of the first leg part, 
 the pair of second leg parts is disposed so as to be shifted relative to each other in radial location by an amount corresponding to a radial width of the second leg part, 
 the pair of first diagonal parts is disposed so as to be shifted relative to each other in radial location by an amount corresponding to the radial width of the first leg part, and 
 the pair of second diagonal parts is disposed so as to be shifted relative to each other in radial location by an amount corresponding to the radial width of the second leg part. 
 
     
     
       10. The armature according to  claim 1 , wherein all of the plurality of first leg parts and the plurality of second leg parts disposed in each of the plurality of slots are of a same phase.